Yesterday, a mysterious green fluorescent substance took over the White Rock Creek, in Dallas, way ahead of St. Patrick's Day. The Simpsons bright green-colored goo was coming from Medical City Dallas Hospital, which is located across the street, and nobody knew what it was.

An emergency crew appeared at the scene and quickly proceeded to block the green goo flow. Then, hazardous material experts were called. Was it a biological attack? Alien bodily fluids? Mutant blood? No. It was non-toxic fluorescent green dye used to detect leaks in the hospital cooling tower number 3.

Nothing to see here except a cool river of green crap, folks. Carry on. [WFAA]